JP2974131B2 - Branch pipe lining material and pipe lining method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a branch pipe lining material for lining the inner peripheral surface of a branch pipe, and a pipe lining method constructed using the branch pipe lining material and the main pipe lining material.

[0002]

2. Description of the Related Art When a pipeline such as a sewer pipe buried underground is deteriorated, a pipe for lining the inner peripheral surface of the pipeline without repairing the pipeline without excavating the pipeline from the ground. A lining method has been proposed and is already in practical use.

[0003] In the pipe lining method described above, a pipe lining material obtained by impregnating an uncured liquid curable resin into a tubular resin adsorbent whose outer peripheral surface is covered with a highly airtight film is turned into a pipe line by fluid pressure. Inserting and inverting the pipe lining material while pressing the pipe lining material against the inner peripheral surface of the conduit, curing the curable resin impregnated in the tube lining material, and curing the inner peripheral surface of the conduit with the cured pipe lining material. This is a method of repairing the pipeline by lining.

The above-mentioned pipe lining method can be similarly applied to a main pipe such as a sewer pipe and a branch pipe which joins the main pipe.

As a branch pipe lining material for lining a branch pipe, the one shown in FIG. 16 has been proposed. That is, FIG. 16 is a perspective view in which a part of the conventional branch pipe lining material 101 is cut away.
Has a tubular resin adsorbent 104 made of a nonwoven fabric such as polyester, the outer surface of which is coated with a highly airtight plastic film, and the tubular resin adsorbent 104 has an uncured liquid curable material. Resin impregnated.

[0006] One end of the tubular resin adsorbent 104 is bent outward to form a flange 105, which has a circular arc substantially equal to the curvature of a main pipe 110 (see FIG. 17) described later. It is curved in a curved shape, and its outer diameter is set to be larger than the inner diameter of a branch pipe 111 (see FIG. 17) described later. The flange 105 retains the above-mentioned arcuate surface shape by curing the curable resin impregnated therein.

Here, a pipe lining method using the branch pipe lining material 101 will be described with reference to FIGS. 17 to 19 are sectional views showing a conventional pipe lining method in the order of steps.

In FIG. 17, reference numeral 110 denotes a main pipe, and 111 denotes a small-diameter branch pipe which joins the main pipe 110.
Inside, a work robot 11 that is pre-assembled and integrated on the ground
2. The pressure bag 113, the branch pipe lining material 101, and the like are introduced and set.

The head 114 of the working robot 112
Is provided with a set nozzle 116, and the flange 10 of the branch pipe lining material 101 is provided on the set nozzle 116.
5 is fixedly set, and the flange portion 1 of the branch pipe lining material 101 is provided.
The portion other than 05 (the non-reversed portion) is accommodated in the pressure bag 113 as shown.

While monitoring the inside of the main pipe 110 and the inside of the branch pipe 111 on the ground with the TV camera 115 installed in the work robot 112 and the TV camera 140 introduced into the branch pipe 111, respectively, Lining material 1
01 is positioned at the branch pipe opening 110a of the main pipe 110, and then the head 114 of the working robot 112 is positioned.
Is moved upward, and the flange portion 10 of the branch pipe lining material 101 is moved.
5 is pressed against the peripheral edge of the branch pipe opening 110a of the main pipe 110 to make it closely adhere.

Next, when a compressor (not shown) installed on the ground is driven to supply compressed air into the pressure bag 113 through the air hose 118, as shown by a broken line in FIG. The material 101 is inserted into the branch pipe 111 toward the ground in the direction indicated by the arrow while being inverted under the pressure of the compressed air.

Thus, the branch pipe 1 of the branch pipe lining material 101
11 is completed, the branch pipe lining material 1
01 is pressed against the inner peripheral surface of the branch pipe 111, and the curable resin impregnated therein is cured by an arbitrary method. Therefore, the branch pipe 111 is hardened by the hardened branch pipe lining material 101. The peripheral surface is lined and repaired.

When the lining of the branch pipe 111 is completed as described above, the lining of the main pipe 110 is performed in the following manner.

That is, as shown in FIG. 18, a main pipe lining material 125 is reversely inserted into the main pipe 110 by compressed air pressure. The main pipe lining material 125 is formed by impregnating a curable resin into a tubular resin adsorbent similarly to the branch pipe lining material 101. At least the outer peripheral surface of the tubular resin adsorbent before inversion is airtight. Tall plastic film is coated.

As described above, the main pipe lining material 125
When the inverted insertion of the main pipe 110 into the main pipe 110 is completed over the entire length of the main pipe 110, the hardening impregnated in the main pipe lining material 125 is performed while the main pipe lining material 125 is pressed against the inner peripheral surface of the main pipe 110. When the conductive resin is cured by an arbitrary method, the main pipe 110 is repaired by lining its inner peripheral surface with the cured main pipe lining material 125. still,
When the main pipe lining material 125 is hardened, the main pipe lining material 125 oozes out from the main pipe lining material 125 and is hardened.
The curable resin adhering to the flange 105 is also cured at the same time, so that the flange 105 of the branch pipe lining material 101 and the main pipe lining material 125 are joined and integrated.

When the lining of the main pipe 110 is completed in the above manner, as shown in FIG. 19, the cutter 138 attached to the tip of the work robot 137 introduced into the main pipe 110 is driven to rotate, and the work robot 137 is rotated. While monitoring the inside of the main pipe 110 with the TV camera 139 installed in the main pipe, a portion of the main pipe lining material 125 covering the branch pipe opening 110a is cut off by the cutter 138, and the branch pipe 111 is opened into the main pipe 110. The branch pipe 1
11 is communicated with the main pipe 110.

[0017]

However, in the conventional branch pipe lining material 101, the flange 105 is hardened in advance and is not impregnated with an unhardened curable resin. If the curable resin that oozes out of the lining material 125 and adheres to the flange portion 105 is hardened, the flange portion 105 and the main pipe lining material 125 are not securely joined and integrated, and a gap is generated between the two. However, problems such as infiltration of groundwater or the like into the main pipe 110 through the gap have occurred.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object thereof is to provide a branch pipe lining material and a pipe lining method capable of reliably joining and integrating a flange portion and a main pipe lining material. Is to provide.

[0019]

In order to achieve the above object, according to the first aspect of the present invention, an uncured curable resin is impregnated in a tubular resin adsorbent having a cured flange formed at one end. In the branch pipe lining material configured, a plurality of holes are formed in a flange portion of the tubular resin adsorbent material.

The invention according to claim 2 is characterized in that a resin adsorbent is attached to the surface of the flange of the tubular resin adsorbent.

According to a third aspect of the present invention, in the second aspect of the present invention, a cured layer is formed on a side of the resin adsorbent in contact with the flange.

According to a fourth aspect of the present invention, in the first aspect of the present invention, a perforated plate is attached to one surface of the flange of the tubular resin adsorbent.

According to a fifth aspect of the present invention, in the first to third or fourth aspects of the present invention, a peeling tube is attached to an outer surface of the tubular resin adsorbent near the flange.

According to a sixth aspect of the present invention, an uncured curable resin is impregnated in a tubular resin adsorbent having a cured flange formed at one end, and a plurality of holes are formed in the flange of the tubular resin adsorbent. The branch pipe lining material thus formed is inserted and set in the main pipe, and the branch pipe lining material is branched by fluid pressure with the flange of the branch pipe lining material pressed against the periphery of the branch pipe opening of the main pipe. After inverting the pipe from the main pipe side to the ground,
While the branch pipe lining material is pressed against the inner peripheral surface of the branch pipe, the curable resin impregnated in the branch pipe lining material is cured,
Thereafter, the main pipe lining material formed by impregnating the curable resin into the tubular resin adsorbent is invertedly inserted into the main pipe by fluid pressure, and then, while the main pipe lining material is pressed against the inner peripheral surface of the main pipe, the same pipe is inserted. The present invention is characterized in that the curable resin impregnated in the pipe lining material is cured, and a portion of the cured main pipe lining material that closes the branch pipe opening is cut off.

Therefore, according to the pipe lining method according to the sixth aspect, which is performed using the branch pipe lining material according to the first aspect, the uncured curable resin oozing out of the main pipe lining material is used for the branch pipe lining. Since it penetrates into the hole formed in the flange of the material and hardens, the flange of the branch pipe lining material and the main pipe lining material are more firmly joined and integrated, and a gap may be generated between them. Absent.

According to the pipe lining method according to the sixth aspect, which is performed using the branch pipe lining material according to the second or third aspect, the uncured curable resin oozing out of the main pipe lining material is a branch. Because it penetrates into the hole drilled in the flange of the pipe lining material and hardens, and is impregnated with the resin adsorbent attached to the surface of the flange (the surface in contact with the main pipe lining material) and hardens, The flange portion of the branch pipe lining material and the main pipe lining material are more firmly joined and integrated.

Further, according to the pipe lining method according to the sixth aspect, which is performed using the branch pipe lining material according to the fourth aspect, the uncured curable resin oozing out of the main pipe lining material is used for the branch pipe lining. The hole formed in the flange of the material and the hole of the perforated plate attached to the surface of the flange (the surface in contact with the main pipe lining material) respectively penetrate and harden. And the main pipe lining material are more firmly joined and integrated.

[0028]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a perspective view showing a part of a branch pipe lining material according to the present invention in a cutaway view, FIG. 2 is an enlarged sectional view taken along line AA of FIG. 1, and FIG. 2 is a flange part of the branch pipe lining material. Plan view, FIG. 4
FIG. 4 is an enlarged sectional view taken along line BB of FIG. 3.

The lateral pipe lining material 1 according to the present invention has a plastic film 2, 3 of which outer peripheral surface is highly airtight.
It has a tubular resin adsorbent 4 made of a non-woven fabric such as polyester, polypropylene, acrylic or the like coated with (see FIG. 2). The tubular resin adsorbent 4 is impregnated with an uncured liquid thermosetting resin. I have. The plastic films 2 and 3 are single-layer or multi-layer films made of polyurethane, polyethylene, nylon, ethylene vinyl alcohol, ionomer, admer, vinyl chloride, etc., and polyester resins and epoxy resins are used as thermosetting resins. Resin, vinyl ester resin and the like are used.

One end of the tubular resin adsorbent 4 is
As shown in FIG. 5, the flange 5 is formed by being folded outward, and has a shape curved into an arc-shaped curved surface substantially equal to the curvature of a main pipe 10 (see FIG. 5) described later. The outer diameter is set to be larger than the inner diameter of a branch pipe 11 (see FIG. 5) described later. The flange portion 5 retains the above-described arcuate curved surface shape by curing the curable resin impregnated therein.

Thus, the branch pipe lining material 1 according to the present invention
In FIG. 3, a plurality of circular holes 6 are formed in the flange 5 as shown in FIG.

Next, a pipe lining method according to the present invention, which is constructed using the branch pipe lining material 1 configured as described above, will be described with reference to FIGS. 5 to 10 are sectional views showing the pipe lining method according to the present invention in the order of steps.

In FIG. 5, 10 is the main pipe, and 11 is the main pipe 1.
In the main pipe 10, a working robot 12, a pressure bag 13, a branch pipe lining material 1, and the like, which are previously assembled and integrated on the ground, are introduced and set in the main pipe 10.

The work robot 12 is driven by hydraulic pressure so that its head 14 moves back and forth in the directions of arrows aa 'and bb' in FIG. 5, and rotates in the direction of cc '. A TV camera 15 for monitoring is installed on the upper part.

A set nozzle 16 is attached to the head 14 of the working robot 12. The flange 5 of the branch pipe lining material 1 is fixedly set on the set nozzle 16. The portion excluding the flange portion 5 (unreversed portion) is accommodated in the pressure bag 13 as shown in FIG.

On the other hand, the pressure bag 13 is closed at one end by a cup 17.
The other end opening is attached to the cylindrical portion 16a of the set nozzle 16 as shown. The pressure bag 13 is connected to the air hose 18 connected to the cup 17.
Is connected to a compressor 19 installed on the ground.

While monitoring the inside of the main pipe 10 on the ground by the TV camera 15 installed on the working robot 12, the flange 5 of the branch pipe lining material 1 is
After being positioned at the branch pipe opening 10a of the main pipe 10, the head 14 of the working robot 12 is moved in the direction of arrow b (upward) in FIG. It is pressed against the peripheral edge of the portion 10a to make it closely contact.

Next, when the compressor 19 installed on the ground is driven to supply compressed air into the pressure bag 13 through the air hose 18, the branch pipe lining material is obtained as shown by a broken line in FIG. 1 is inserted into the branch pipe 11 from the main pipe 10 side toward the ground in the direction indicated by the arrow while being inverted under the pressure of the compressed air.

When the inverted insertion of the branch pipe lining material 1 into the branch pipe 11 is completed, a cup 20 is attached to the upper end of the branch pipe lining material 1 and connected to the cup 20 as shown in FIG. The compressed air is supplied into the branch pipe lining material 1 from the air hose 21 thus pressed, and the branch pipe lining material 1 is pressed against the inner peripheral surface of the branch pipe 11. Then, while maintaining this state, the hot water pump 22 is driven to supply the hot water in the hot water tank 23 into the branch pipe lining material 1 via the hot water hose 24, and the thermosetting impregnated in the branch pipe lining material 1 The resin is cured by heating, and the branch pipe 11 is repaired by lining its inner peripheral surface with the cured branch pipe lining material 1.

Thereafter, the hot water in the branch pipe lining material 1 is drained, the head 14 of the work robot 12 is moved in the direction of arrow b '(downward) in the figure, and the set nozzle 16 is detached from the branch pipe lining material 1. When the work robot 12 is moved in the main pipe 10 and removed from the main pipe 10, the pressure bag 13 attached to the set nozzle 16 is also removed from the main pipe 10 together with the work robot 12, and the branch pipe is placed there. A series of lining operations for 11 is completed.

When the lining of the branch pipe 11 is completed, the lining is applied to the main pipe 10 in the following manner.

That is, as shown in FIG. 7, one end of the main pipe lining material 25 is attached to the outer periphery of the lower end opening of the pressure vessel 26, and the compressor 27 installed on the ground is driven to generate compressed air. When the main pipe lining material 25 is supplied from the pipe 28 into the pressure vessel 26, the main pipe lining material 25 is inserted into the main pipe 10 in the direction indicated by the arrow in FIG. The main pipe lining material 25 is formed by impregnating a thermosetting resin into a tubular resin adsorbent similarly to the branch pipe lining material 1, and at least the outer peripheral surface of the resin adsorbent before inversion is airtight. Tall plastic film is coated. Further, as shown in FIG. 7, a pressure gauge 29 and a valve 30 are mounted in the middle of the pipe 28.

A hot water hose 31 is attached to the end of the main pipe lining material 25, and the main pipe lining material 25 is inserted upside down into the main pipe 10 over its entire length as shown in FIG. Then, the hot water hose 31 is drawn into the main pipe lining material 25 and the pressure vessel 26. A plurality of injection ports (not shown) for discharging hot water are formed at appropriate intervals in a portion of the hot water hose 31 facing the main pipe lining material 25.

As shown in FIG. 8, a hot water pump 32 is provided on the ground, and a hot water discharge pipe 33 attached to a lower portion of the pressure vessel 26 is connected to a suction side of the hot water pump 32. I have. The discharge side of the hot water pump 32 is connected to a boiler 34, and the hot water hose 31 is connected to the boiler 34. A thermometer 35 and a valve 36 are mounted in the middle of the hot water hose 31.

When the inside of the main pipe lining material 25 and the pressure vessel 26 are filled with compressed air and the main pipe lining material 25 is pressed against the inner peripheral wall of the main pipe 10, the main pipe lining material 25 is impregnated. A part of the uncured thermosetting resin that has been oozed out penetrates into a plurality of circular holes 6 formed in the flange 5 of the lateral pipe lining material 1.

While maintaining the above state, the hot water pump 3
When the boiler 34 and the boiler 34 are driven, the hot water heated to a predetermined temperature by the boiler 34 flows through the hot water hose 31 in the direction of the arrow in FIG. 8 and is ejected from a plurality of injection ports formed in the hot water hose 31. Then, the main pipe lining material 25 is subjected to hot water showering from the inside, and the thermosetting resin impregnated in the main lining material 25 is heated and hardened by the hot water, and the main pipe 10
Is repaired by lining its inner peripheral surface with the cured main pipe lining material 25.

By the way, when the main pipe lining material 25 is hardened, the thermosetting material which has permeated from the main pipe lining material 25 and penetrated into the plurality of circular holes 6 formed in the flange portion 5 of the branch pipe lining material 1. Since the resin is also cured at the same time, the flange portion 5 of the branch pipe lining material 1 and the main pipe lining material 25 are more firmly joined and integrated, and the generation of a gap between the two is reliably prevented.

When the lining of the main pipe 10 is completed in the above manner, as shown in FIG. 9, the cutter 38 attached to the tip of the work robot 37 introduced into the main pipe 10 is driven to rotate, and the work robot 37 is rotated. TV set in
While monitoring the inside of the main pipe 10 and the inside of the branch pipe 11 with the camera 39 and the TV camera 40 introduced into the branch pipe 11, respectively, the portion covering the branch pipe opening 10a of the main pipe lining material 25 is cut off by the cutter 38. Then, the branch pipe 11 is opened into the main pipe 10 so that the branch pipe 11 communicates with the main pipe 10.

When the cutting operation of the main pipe lining material 25 is completed as described above, as shown in FIG.
The main pipe 10 is lined and repaired by the branch pipe lining material 1 and the main pipe lining material 25, respectively, and the flange 5 of the branch pipe lining material 1 and the main pipe lining material 10 are securely joined and integrated as described above. Therefore, there is no problem that a gap is generated between the two and groundwater or the like intrudes from the gap.

By the way, as shown in FIGS. 11 and 12, a plurality of disc-shaped resin materials are inserted between the circular holes 6 on the lower surface of the flange 5 of the lateral pipe lining material 1 (the surface that comes into contact with the main pipe lining material 25). The adsorbent 41 may be attached using bolts 42 and nuts 43. Further, as shown in FIG. 12, one end of a peeling tube 7 may be temporarily bonded to the outer surface of the tubular resin adsorbent 4 near the flange 5 (a description of a branch pipe lining method using the peeling tube 7). Is omitted). 11 is a plan view of the branch pipe lining material 1, and FIG.
It is a line sectional view.

After lining the branch pipe 11 using the branch pipe lining material 1, the main pipe lining material 25 is inserted upside down into the main pipe 10 as shown in FIG. When the curable resin impregnated in the main pipe lining material 25 is cured while the lining material 25 is pressed against the inner peripheral wall of the main pipe 10, the uncured liquid curable resin oozing out of the main pipe lining material 25 is a branch pipe. Since it penetrates into the circular hole 6 formed in the flange portion 5 of the lining material 1 and hardens, and is impregnated with the resin adsorbent 41 attached to the flange portion 6 and hardens, the branch pipe lining material 1 Flange 5 and main pipe lining material 2
5 are further firmly joined and integrated.

If the resin adsorbent 41 attached to the flange 5 of the branch pipe lining material 1 is large, the resin adsorbent 41 hangs down and deforms before the lining of the main pipe 10 is performed. As shown in FIG. 14, if the hardened layer 41a is formed by partially impregnating the curable resin on the side of the resin adsorbent 41 that is in contact with the flange 5 and curing the resin, the resin adsorbent 41 hangs down. No deformation.

Instead of the resin adsorbent 41, a perforated plate 44 as shown in FIG. 15 may be attached using bolts 42 and nuts 43, and the branch pipe lining material 1 to which this perforated plate 44 is attached is used. After the lining of the branch pipe 11 is performed, the main pipe lining material 25 is reversely inserted into the main pipe 10 and pressed against the inner peripheral wall of the main pipe 10, and the uncured material that has permeated from the main pipe lining material 25 The curable resin is formed in a circular hole 6 (see FIGS. 11 and 1) formed in the flange 5 of the branch pipe lining material 1.
2) and into the hole 44a of the perforated plate 44 to be hardened, so that the flange portion 5 of the branch pipe lining material 1 and the main pipe lining material 2
5 are further firmly joined and integrated.

[0055]

As is apparent from the above description, claim 1
According to the pipe lining method according to claim 6, which is performed using the branch pipe lining material described above, the uncured curable resin that has permeated from the main pipe lining material is perforated in the flange portion of the branch pipe lining material. Since it penetrates into the hole and hardens, the flange portion of the branch pipe lining material and the main pipe lining material are more firmly joined and integrated, and an effect that a gap is prevented from being generated between them is obtained. .

According to the pipe lining method according to the sixth aspect, which is performed using the branch pipe lining material according to the second or third aspect, the uncured curable resin that has permeated from the main pipe lining material is a branch. Because it penetrates into the hole drilled in the flange of the pipe lining material and hardens, it is impregnated with the resin absorbent attached to the surface of the flange (the surface in contact with the main pipe lining material) and hardens. The effect is obtained that the flange portion of the branch pipe lining material and the main pipe lining material are more strongly joined and integrated.

Further, according to the pipe lining method according to the sixth aspect, which is performed using the branch pipe lining material according to the fourth aspect, the uncured curable resin oozing out of the main pipe lining material is used for the branch pipe lining. The hole formed in the flange of the material and the hole of the perforated plate attached to the surface of the flange (the surface in contact with the main pipe lining material) respectively penetrate and harden. And the main pipe lining material can be more firmly joined and integrated.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing a branch pipe lining material according to the present invention.

FIG. 2 is an enlarged sectional view taken along line AA of FIG.

FIG. 3 is a plan view of a flange portion of the lateral pipe lining material according to the present invention.

FIG. 4 is an enlarged sectional view taken along line BB of FIG. 3;

FIG. 5 is a sectional view showing a pipe lining method according to the present invention.

FIG. 6 is a sectional view showing a pipe lining method according to the present invention.

FIG. 7 is a sectional view showing a pipe lining method according to the present invention.

FIG. 8 is a sectional view showing a pipe lining method according to the present invention.

FIG. 9 is a sectional view showing a pipe lining method according to the present invention.

FIG. 10 is a sectional view showing a pipe lining method according to the present invention.

FIG. 11 is a plan view of a branch pipe lining material according to the present invention.

FIG. 12 is a sectional view taken along line CC of FIG. 11;

FIG. 13 is a partial cross-sectional view showing a state around a branch pipe opening when main pipe lining is performed.

FIG. 14 is a partial sectional view of a flange portion of the lateral pipe lining material according to the present invention.

FIG. 15 is a partial sectional view of a flange portion of the lateral pipe lining material according to the present invention.

FIG. 16 is a partially cutaway perspective view of a conventional branch pipe lining material.

FIG. 17 is a sectional view showing a conventional pipe lining method.

FIG. 18 is a sectional view showing a conventional pipe lining method.

FIG. 19 is a sectional view showing a conventional pipe lining method.

[Explanation of symbols]

 Reference Signs List 1 branch pipe lining material 4 tubular resin adsorbent 5 flange 6 circular hole (hole) 7 peeling tube 10 main pipe 10a main pipe branch opening 11 branch pipe 25 main pipe lining material 41 resin adsorbent 41a hardened layer 44 Perforated plate

────────────────────────────────────────────────── ─── Continued on the front page (51) Int.Cl. ⁶ Identification code FI B29L 23:00 (72) Inventor Takao Kamiyama 31-27 Daikancho, Hiratsuka-shi, Kanagawa Prefecture Shonan Plastics Manufacturing Co., Ltd. (72) Invention Company Yasuhiro Yokoshima Ishishita-cho, Yuki-gun, Ibaraki Pref. (4) References JP-A-4-355115 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) B29C 63/00- 63/48 B32B 1/00-35/00 F16L 1/00 F16L 55/10-55/18

Claims (6)

(57) [Claims] 1. A branch pipe lining material formed by impregnating an uncured curable resin into a tubular resin adsorbent having a cured flange formed at one end, wherein a plurality of the flanges of the tubular resin adsorbent are provided. A branch pipe lining material characterized by having a hole formed therein. 2. The branch pipe lining material according to claim 1, wherein a resin adsorbent is attached to a surface of a flange portion of the tubular resin adsorbent. 3. The branch pipe lining material according to claim 2, wherein a hardened layer is formed on a side of the resin adsorbent in contact with the flange. 4. The branch pipe lining material according to claim 1, wherein a perforated plate is attached to a surface of a flange portion of the tubular resin adsorbent. 5. The lateral pipe lining material according to claim 1, wherein a peeling tube is attached to an outer surface of the tubular resin adsorbent near the flange. 6. A branch formed by impregnating an uncured curable resin into a tubular resin adsorbent having a cured flange formed at one end, and forming a plurality of holes in the flange of the tubular resin adsorbent. With the pipe lining material inserted and set in the main pipe, with the flange of the branch pipe lining material pressed against the periphery of the branch pipe opening of the main pipe, the branch pipe lining material is inserted into the branch pipe by fluid pressure from the main pipe side. After being inverted and inserted toward the ground, the curable resin impregnated in the branch pipe lining material is cured while the branch pipe lining material is pressed against the inner peripheral surface of the branch pipe, and then the curable resin is added to the tubular resin adsorbent. After the main pipe lining material, which is impregnated with the main pipe, is reversely inserted into the main pipe by fluid pressure, the curable resin impregnated in the main pipe lining material while the main pipe lining material is pressed against the inner peripheral surface of the main pipe. Hardened, hardened main pipe lining material branch pipe A pipe lining method characterized by cutting off the portion that blocks the opening.